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drm/msm/dpu: check for overflow in _dpu_crtc_setup_lm_bounds()

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[ Upstream commit 3a0851b442 ]

Make _dpu_crtc_setup_lm_bounds() check that CRTC width is not
overflowing LM requirements. Rename the function accordingly.

Fixes: 25fdd5933e ("drm/msm: Add SDM845 DPU support")
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Tested-by: Abhinav Kumar <quic_abhinavk@quicinc.com> # sc7280
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/612237/
Link: https://lore.kernel.org/r/20240903-dpu-mode-config-width-v6-3-617e1ecc4b7a@linaro.org
Signed-off-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Dmitry Baryshkov 2024-09-03 06:22:46 +03:00 committed by Greg Kroah-Hartman
parent adde6c68bf
commit dd58a5f8b3
1 changed files with 13 additions and 4 deletions
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17
drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c
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@ -722,12 +722,13 @@ void dpu_crtc_complete_commit(struct drm_crtc *crtc)
_dpu_crtc_complete_flip(crtc);
}
static void _dpu_crtc_setup_lm_bounds(struct drm_crtc *crtc,
static int _dpu_crtc_check_and_setup_lm_bounds(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
struct dpu_crtc_state *cstate = to_dpu_crtc_state(state);
struct drm_display_mode *adj_mode = &state->adjusted_mode;
u32 crtc_split_width = adj_mode->hdisplay / cstate->num_mixers;
struct dpu_kms *dpu_kms = _dpu_crtc_get_kms(crtc);
int i;
for (i = 0; i < cstate->num_mixers; i++) {
@ -738,7 +739,12 @@ static void _dpu_crtc_setup_lm_bounds(struct drm_crtc *crtc,
r->y2 = adj_mode->vdisplay;
trace_dpu_crtc_setup_lm_bounds(DRMID(crtc), i, r);
if (drm_rect_width(r) > dpu_kms->catalog->caps->max_mixer_width)
return -E2BIG;
}
return 0;
}
static void _dpu_crtc_get_pcc_coeff(struct drm_crtc_state *state,
@ -814,7 +820,7 @@ static void dpu_crtc_atomic_begin(struct drm_crtc *crtc,
DRM_DEBUG_ATOMIC("crtc%d\n", crtc->base.id);
_dpu_crtc_setup_lm_bounds(crtc, crtc->state);
_dpu_crtc_check_and_setup_lm_bounds(crtc, crtc->state);
/* encoder will trigger pending mask now */
drm_for_each_encoder_mask(encoder, crtc->dev, crtc->state->encoder_mask)
@ -1208,8 +1214,11 @@ static int dpu_crtc_atomic_check(struct drm_crtc *crtc,
if (crtc_state->active_changed)
crtc_state->mode_changed = true;
if (cstate->num_mixers)
_dpu_crtc_setup_lm_bounds(crtc, crtc_state);
if (cstate->num_mixers) {
rc = _dpu_crtc_check_and_setup_lm_bounds(crtc, crtc_state);
if (rc)
return rc;
}
/* FIXME: move this to dpu_plane_atomic_check? */
drm_atomic_crtc_state_for_each_plane_state(plane, pstate, crtc_state) {